Calipers.



Patented Feb. I8, |902.

H. BUBE. CLIPERS;

(Application filed Oct. 18, 1901.) V

(No Model.)

' Niirnn STATES ATENT OFFICE.

HANS BUBE, OF BOTHFIELD, GERMANY.

oALlPERs.

SPECIFICATION forming part of Letters Patent No. 693,538, dated February18, 1902.

Application tiled October 18, 1901. Serial No. 791061. (No model.)

To cl/ZZ whom t may concern:

Be it known that I, HANS BUBE, a subject of the Emperor of Germany,residing at Bothiield, in the Province of Hanover, Germany, haveinvented certain new and useful Improvements in Calipers, of which thefollowing is a specification.

My invention relates particularly to devices for measuring both thelengths and diameters of logs and the like; and its object is to providea device of this kind which may be used for the measurement of bothlengths and diameters, of strong, light, and simple construction, whichmay be readily folded for the purpose of packing or transportation.

It consists of the combination of parts and arrangement of detailshereinafter described and claimed,and illustrated in the accompanyingdrawings, forming a part hereof.

Heretofore calipers have been made for measuring large diameters oflogs, trees, and the like in several parts adapted to be folded up. Thesize and weight of such calipers have necessarily been so great as torender them cumbersome in use or transportation.

I have produced a device which consists of two parts, the one adapted tobe set at right angles to the other and to slidabl y engage the same,both parts being made in links adapted to fold together and the links soconnected to each other that while in use they may be securely held inalinement.

In the accompanying drawings, Figure l is a plan view of the calipersand measuring instrumentembodyingmyimprovements. Fig. 2 is an edge viewof the same. Fig. 3 is a side view of the movable arm and engagingdevice.

One of thelinks a of the rule a in the drawings has a movable arm bpivotally attached thereto vand provided on its outer end with a pin c,adapted to snap into a hole on the end of the fourth link when the threelinks are disposed at right angles to the others. In

.this position the iirst three links form an arm d of the calipers. Thenumber of links, however, which are used for forming the arm d may bevaried at will; but in most cases the number of links shown in thedrawings will be sufficient for measuring the diameter of any ordinarybody. l

One side of the rule ct may be provided with divisions for linealmeasnrementin the ordinary way, while the other side is provided withdivision-marks beginning from the inner edge a of the turned-up arm. Themovable arm f is formed by a rule, which may also be provided, ifdesired, with division-marks, so that when detached it will serve as ameasuring-rule. The plate-spring g is fixed on the same by any suitablemeans, as the rivets g and g/, its free end being a plate t', with itstwo side edges t" turned upwardly to form beveled flanges j, which willenable the slide to easily pass over the uneven joints of the links. Theplate is also provided with inwardly-projecting teeth 7L on either edge,which in connection with the plate form the guide for the movable armj', as shown in Fig. 3. The movable arm f is clamped onto the rule, thelatter being pressed against the face rc of one link of the arm f, andthen the diameter of the edge being measured may be read off at oncefrom the inner edge of the armfin the division of the rule a.

What I claim as new isl. In calipers provided with two graduated armseach composed of links and provided with means for holding the same whenextended at right angles to each other, and a third movable arm providedwith elastic means for engaging and disengagin g the same with one ofthe other arms and keeping the same at right angles thereto,substantiall)T as described.

2. In calipers provided with two graduated arms each made of links andmeans for hold* ing the arms at right angles to each other, of a thirdmovable arm adapted to be held at right angles to one of the other armsby means of aplate-spring fixed on one side of the third arm and havingtwo of its side edges turned over to form beveled flanges which willenable the third arm to slide easily over the uneven joints of the linksof the arm, with which it is engaged.

3. In calipers provided with two graduated arms each made of links andmeans for holding the arms at right angles to each other', Witness myhand this 30th day of Septemof a third movable arm adapted to be heldber, 1901, in the presence of two subscribing 1o at right angles to oneof the other arms by Witnesses. means of a plate-spring Iixed on oneside of 5 the said third arm and having inWardly-pro- 1 jeoting teeth oneither edge forming a guide YVitnesses: for keeping the movable arm atright angles LEONORE RASCH, with the arm with which it is in engagement.C. C. STEvENsoN.

HANS BUBE.

